x86/xen/setup.c

125 unsigned long __ref xen_chk_extra_mem(unsigned long pfn)
130 		if (pfn >= xen_extra_mem[i].start_pfn &&
131 		    pfn < xen_extra_mem[i].start_pfn + xen_extra_mem[i].n_pfns)
135 	return IDENTITY_FRAME(pfn);
143 	unsigned long pfn, pfn_s, pfn_e;
151 		for (pfn = pfn_s; pfn < pfn_e; pfn++)
152 			set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
157  * Finds the next RAM pfn available in the E820 map after min_pfn.
158  * This function updates min_pfn with the pfn found and returns
218 	unsigned long pfn, end;
225 	for (pfn = start_pfn; pfn < end; pfn++) {
226 		unsigned long mfn = pfn_to_mfn(pfn);
228 		/* Make sure pfn exists to start with */
229 		if (mfn == INVALID_P2M_ENTRY || mfn_to_pfn(mfn) != pfn)
233 		WARN(ret != 1, "Failed to release pfn %lx err=%d\n", pfn, ret);
237 			if (!__set_phys_to_machine(pfn, INVALID_P2M_ENTRY))
249 static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
253 		.val = pfn
257 	if (!set_phys_to_machine(pfn, mfn)) {
258 		WARN(1, "Failed to set p2m mapping for pfn=%ld mfn=%ld\n",
259 		     pfn, mfn);
265 		WARN(1, "Failed to set m2p mapping for mfn=%ld pfn=%ld\n",
266 		     mfn, pfn);
270 	if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
272 		WARN(1, "Failed to update kernel mapping for mfn=%ld pfn=%ld\n",
273 		      mfn, pfn);
309 		/* Map first pfn to xen_remap_buf */
334  * This function takes a contiguous pfn range that needs to be identity mapped
348 	unsigned long pfn;
372 			pr_warn("Unable to find available pfn range, not remapping identity pages\n");
392 	for (pfn = start_pfn; pfn <= max_pfn_mapped && pfn < end_pfn; pfn++)
394 			(unsigned long)__va(pfn << PAGE_SHIFT),
451  * The remap information (which mfn remap to which pfn) is contained in the
459 	unsigned long mfn_save, pfn;
473 		pfn = xen_remap_buf.target_pfn;
475 			xen_update_mem_tables(pfn, xen_remap_buf.mfns[i]);
477 			pfn++;
479 		if (pfn_s == ~0UL || pfn == pfn_s) {